[knaylomo]

I also had this problem on my Intel SS4200-E and just figured it out.

It's due to ACLs being set on the filesystem which is (for whatever reason) affecting file copying under NFS.

First enable SSH on the SS4200 and log in as root.

To show your current ACLs:
# getfacl /mnt/soho_storage/samba/shares/test

To clear these out:
# setfacl -b /mnt/soho_storage/samba/shares/test

After doing this, I could now copy/create files without first creating the zero byte files.

This is not a complete fix however, as if you change the access lists in the web gui it could be reset. I also have not tried yet whether this persists after a reboot. It also opens the files to everyone.

It is likely possible to fix this permanently, or at least adjust the ACLs more correctly rather than just clearing them. I have not looked into this yet.

Hope this helps.